After this update I was finally able to sync the phonebook, and server setting is finally staying there, but the rest is still confirmed:
- messages received only at startup, then nothing until disconnect/reconnect or close/reopen
- none of the messages I send are received by my contacts, ever
- list of group participants stuck at "fetching"

@coderus
I understand you can't reproduce these bug, but I'm reporting nevertheless. If you want I can also try to send you logs with the new version, let me know.